Of the 14 measurements carried out by the association between the end of September 2023 and the end of March 2024 under the Alexandre-III and Alma bridges, where swimming, triathlon and open water events will be held, thirteen were found to be “above or very much above the permissible limits recommended for swimming.
Regarding the 2006 European swimming guideline and the swimming and triathlon federation scales, the concentrations of two bacteria indicative of faecal contamination, Escherichia coli and enterococcus, should not exceed 1,000 colony forming units (cfu)/100 ml in E .coli and 400 cfu/100 ml in enterococci. Beyond the specific limits, the water is considered unsuitable for swimming.
Analyzes carried out by Surfrider, in collaboration with the Eau de Paris laboratory and Analy-Co, “randomly and timed to overcome weather conditions (rain, sun, flood)”, show E.coli concentrations regularly higher from 2,000 cfu/100 ml (maximum 7,250 under the Alma bridge on February 7, 2024) and 500 cfu/100 ml for enterococci (maximum 1,190 on February 7) .
The analyzed period is not part of that foreseen for swimming in the Seine and which concerns the summer months.
However, other analyzes sent to AFP in early 2024 by the city hall of the French capital showed that between June and September 2023, none of the 14 water sampling points in Paris had reached an adequate level of quality compared to European standards. instructions.
In the face of these “alarming” results, Surfrider expresses its “increasing concerns about the quality of the water of the Seine” and points out the “dangers” for athletes, and moreover, for the residents of Ile-de-France, ” to develop into polluted waters”.
Faced with a “lack of visibility” and communication from the authorities, the association is calling in an open letter for accessibility to the venues “before and during” the entire duration of the Games, so that it can continue to take its own samples on site .
The triathlon (July 30 and 31, August 5) and the open sea swimming, now called the Swimming Marathon (August 8 and 9), are still particularly threatened by heavy rains, which will degrade the water of the Seine through the discharge into sewage bed and mixed with rainwater.
It is recalled that at the beginning of August 2023, the general test for the open sea swimming competitions was canceled due to clear water quality limits being exceeded.
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